US3271764A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radar tornado alarm
Assignee: Individual
•
Filing: 1964-04-24
•
Granted: 1966-09-06
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Expires: 1984-04-24
Abstract
No abstract record available.
Inventors
- 👤 Atlas David
- 👤 Roger M Lhermitte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:01
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/88; G01S13/95; Y; Y02; Y02A; Y02A90/00; Y02A90/10
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
126 words
A RADAR TORNADO DETECTION AND ALARM SYSTEM WHEREIN RADAR PULSE RETURNS FROM SAID TORNADO FLUCTUATE IN FREQUENCY DETERMINED BY THE VELOCITY CHARACTERISTICS OF THE TORNADO COMPRISING MEANS FOR DIRECTING RADIANT ENERGY IN THE FORM OF PULSES TOWARD THE REGION OF SAID TORNADO, SAID DIRECTED PULSES HAVING A REPETITION FREQUENCY LARGER IN MAGNITUDE THAN SAID FLUCTUATING FREQUENCY, MEANS TO RECEIVE RETURN PULSES FROM SAID TORNADO AND SAID REGION, MEANS TO DETECT SAID RETURN PULSES AT PRESELECTED RANGE INTERVALS, MEANS TO SELECT FROM SAID DETECTED PULSE ONLY SIGNALS EXCLUSIVELY REPRESENTATIVE OF SAID TORNADO AT THE CORRESPONDING RANGE INTERVAL THEREOF, SAID SELECTING MEANS INCLUDING A SERIES COMBINATION OF A BOXCAR CIRCUIT AND A HIGH PASS FILTER WITH SAID FILTER PASSING SIGNALS HAVING FREQUENCIES EXCEEDING TWO THOUSAND CYCLES PER SECOND.
Claim 2
Dependent Claim
126 words
A RADAR TORNADO DETECTION AND ALARM SYSTEM WHEREIN RADAR PULSE RETURNS FROM SAID TORNADO FLUCTUATE IN FREQUENCY DETERMINED BY THE VELOCITY CHARACTERISTICS OF THE TORNADO COMPRISING MEANS FOR DIRECTING RADIANT ENERGY IN THE FORM OF PULSES TOWARD THE REGION OF SAID TORNADO, SAID DIRECTED PULSES HAVING A REPETITION FREQUENCY LARGER IN MAGNITUDE THAN SAID FLUCTUATING FREQUENCY, MEANS TO RECEIVE RETURN PULSES FROM SAID TORNADO AND SAID REGION, MEANS TO DETECT SAID RETURN PULSES AT PRESELECTED RANGE INTERVALS, MEANS TO SELECT FROM SAID DETECTED PULSE ONLY SIGNALS EXCLUSIVELY REPRESENTATIVE OF SAID TORNADO AT THE CORRESPONDING RANGE INTERVAL THEREOF, SAID SELECTING MEANS INCLUDING A SERIES COMBINATION OF A BOXCAR CIRCUIT AND A HIGH PASS FILTER WITH SAID FILTER PASSING SIGNALS HAVING FREQUENCIES EXCEEDING TWO THOUSAND CYCLES PER SECOND.
References Cited (Backward Citations)
US2535274A
Cited
US2659078A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |